ter and up to 1 cm. wide; dise fleshy-thickened in the 
middle below. Column stout, about 5 mm. high. 
This plant is the second species referable to the remark- 
able South American genus Vargasiella. It is clearly dis- 
tinct from V’. peruviana C. Schweinf. in its greater vege- 
tative proportions, its bright purple (rather than whitish 
pink) flowers, its narrower, longitudinally concave sepals 
and its distinctly clawed lip. 
VenezueL_a: State of Bolivar, Chimantd Massif, northwestern part 
of summit of Abadcapa-tepui, at 2125-2300 meters altitude, in Bonnetia 
forest, April 13, 1953, Julian A. Steyermark 74914 (Tyre in Herb. 
Ames No. 69272). 
Oncidium vagans C. Schweinf: sp. nov. 
Herba magna, vagans, terrestris vel scandens, valde 
variabilis. Rhizoma cauliforme, plusminusve crassum, 
simplex vel in nodo ramosum, vaginis arctis, tubularibus, 
scarlosis, evanidis omnino celatum, radices remotas, sim- 
plices, longas nune emittens. Pseudobulbi remoti, cylin- 
dracei vel anguste pyriformes, prope apicem saepissime 
bifoliati, vaginis nonnullis, scariosis, evanidis inferne or- 
nati. Folia lanceolata vel anguste oblongo-lanceolata vel 
anguste elliptico-lanceolata, acuta et apiculata, papyra- 
cea. Inflorescentia folia multo superans, e pseudobulbi 
basi exoriens, superne perlaxe paniculata, suberecta; pe- 
dunculus vaginis nonnullis, parvis, arctis ornatus; rhachis 
plusminusve fractiflexa, cum ramis horizontalibus vel de- 
curvis laxe paucifloris. Flores parvi, cum segmentis late 
patentibus. Sepalum dorsale perbreviter unguiculatum, 
oblongo-ovatum vel oblongo-ovale, acutum vel apice ro- 
tundatum, trinervium. Sepala lateralia oblique obovato- 
oblonga vel oblongo-oblanceolata, apice rotundata vel 
acuta, quadrinervia, ad basim paululo unguiculatam an- 
gustata. Petala breviter unguiculata, abrupte ovato- 
oblonga vel oblongo-ovalia, apice lato plusminusve retusa 
et saepe subacuta, quinquenervia. Labellum segmentis 
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